<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
</head>
<body>
<div>
    <h1>修改</h1>
    <input type="text" v-model="product.id" placeholder="id">
    <input type="text" v-model="product.title" placeholder="商品标题">
    <input type="text" v-model="product.price" placeholder="商品价格">
    <input type="text" v-model="product.num" placeholder="商品库存">
    <input type="button" value="修改" @click="update()">
</div>
<script src="https://cdn.bootcdn.net/ajax/libs/axios/0.21.1/axios.min.js"></script>
 <script src="https://cdn.staticfile.org/vue/2.2.2/vue.min.js"></script>
     <script>
         let v = new Vue({
             el:"body>div",
             data:{
                 product:{id:"",title:"",price:"",num:""}
             },
             methods:{
                 update(){
                     axios.post("/update",v.product).then(function (response) {
                         alert("修改成功")
                         location.href="/"
                     })
                 }

             },
             created:function () {
                 axios.get("/selectById"+location.search).then(function (response) {
                     v.product = response.data
                 })
             }


         })
     </script>
</body>
</html>